in6_pcb.c revision 1.23
1 /* $NetBSD: in6_pcb.c,v 1.23 2000/06/03 14:36:35 itojun Exp $ */ 2 /* $KAME: in6_pcb.c,v 1.44 2000/06/02 12:14:50 jinmei Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1991, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 66 */ 67 68 #include "opt_ipsec.h" 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/malloc.h> 73 #include <sys/mbuf.h> 74 #include <sys/protosw.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/ioctl.h> 78 #include <sys/errno.h> 79 #include <sys/time.h> 80 #include <sys/proc.h> 81 82 #include <net/if.h> 83 #include <net/route.h> 84 85 #include <netinet/in.h> 86 #include <netinet/in_var.h> 87 #include <netinet/in_systm.h> 88 #include <netinet/ip.h> 89 #include <netinet/in_pcb.h> 90 #include <netinet/ip6.h> 91 #include <netinet6/ip6_var.h> 92 #include <netinet6/in6_pcb.h> 93 #include <netinet6/nd6.h> 94 95 #include "loop.h" 96 extern struct ifnet loif[NLOOP]; 97 #include "faith.h" 98 99 #ifdef IPSEC 100 #include <netinet6/ipsec.h> 101 #include <netkey/key.h> 102 #include <netkey/key_debug.h> 103 #endif /* IPSEC */ 104 105 struct in6_addr zeroin6_addr; 106 107 int 108 in6_pcballoc(so, head) 109 struct socket *so; 110 struct in6pcb *head; 111 { 112 struct in6pcb *in6p; 113 114 MALLOC(in6p, struct in6pcb *, sizeof(*in6p), M_PCB, M_NOWAIT); 115 if (in6p == NULL) 116 return(ENOBUFS); 117 bzero((caddr_t)in6p, sizeof(*in6p)); 118 in6p->in6p_head = head; 119 in6p->in6p_socket = so; 120 in6p->in6p_hops = -1; /* use kernel default */ 121 in6p->in6p_icmp6filt = NULL; 122 in6p->in6p_next = head->in6p_next; 123 head->in6p_next = in6p; 124 in6p->in6p_prev = head; 125 in6p->in6p_next->in6p_prev = in6p; 126 #ifndef INET6_BINDV6ONLY 127 if (ip6_bindv6only) 128 in6p->in6p_flags |= IN6P_BINDV6ONLY; 129 #else 130 in6p->in6p_flags |= IN6P_BINDV6ONLY; /*just for safety*/ 131 #endif 132 so->so_pcb = (caddr_t)in6p; 133 return(0); 134 } 135 136 int 137 in6_pcbbind(in6p, nam) 138 register struct in6pcb *in6p; 139 struct mbuf *nam; 140 { 141 struct socket *so = in6p->in6p_socket; 142 struct in6pcb *head = in6p->in6p_head; 143 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 144 struct proc *p = curproc; /* XXX */ 145 u_int16_t lport = 0; 146 int wild = 0, reuseport = (so->so_options & SO_REUSEPORT); 147 int error; 148 149 if (in6p->in6p_lport || !IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 150 return(EINVAL); 151 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0 && 152 ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || 153 (so->so_options & SO_ACCEPTCONN) == 0)) 154 wild = IN6PLOOKUP_WILDCARD; 155 if (nam) { 156 sin6 = mtod(nam, struct sockaddr_in6 *); 157 if (nam->m_len != sizeof(*sin6)) 158 return(EINVAL); 159 /* 160 * We should check the family, but old programs 161 * incorrectly fail to intialize it. 162 */ 163 if (sin6->sin6_family != AF_INET6) 164 return(EAFNOSUPPORT); 165 166 /* 167 * since we do not check port number duplicate with IPv4 space, 168 * we reject it at this moment. If we leave it, we make normal 169 * user to hijack port number from other users. 170 */ 171 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 172 return(EADDRNOTAVAIL); 173 174 /* 175 * If the scope of the destination is link-local, embed the 176 * interface index in the address. 177 */ 178 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 179 /* XXX boundary check is assumed to be already done. */ 180 /* XXX sin6_scope_id is weaker than advanced-api. */ 181 struct in6_pktinfo *pi; 182 if (in6p->in6p_outputopts && 183 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 184 pi->ipi6_ifindex) { 185 sin6->sin6_addr.s6_addr16[1] 186 = htons(pi->ipi6_ifindex); 187 } else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) 188 && in6p->in6p_moptions 189 && in6p->in6p_moptions->im6o_multicast_ifp) { 190 sin6->sin6_addr.s6_addr16[1] = 191 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 192 } else if (sin6->sin6_scope_id) { 193 /* boundary check */ 194 if (sin6->sin6_scope_id < 0 195 || if_index < sin6->sin6_scope_id) { 196 return ENXIO; /* XXX EINVAL? */ 197 } 198 sin6->sin6_addr.s6_addr16[1] 199 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 200 /* this must be cleared for ifa_ifwithaddr() */ 201 sin6->sin6_scope_id = 0; 202 } 203 } 204 205 lport = sin6->sin6_port; 206 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 207 /* 208 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 209 * allow compepte duplication of binding if 210 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 211 * and a multicast address is bound on both 212 * new and duplicated sockets. 213 */ 214 if (so->so_options & SO_REUSEADDR) 215 reuseport = SO_REUSEADDR|SO_REUSEPORT; 216 } else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 217 struct sockaddr_in sin; 218 219 bzero(&sin, sizeof(sin)); 220 sin.sin_len = sizeof(sin); 221 sin.sin_family = AF_INET; 222 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 223 sizeof(sin.sin_addr)); 224 if (ifa_ifwithaddr((struct sockaddr *)&sin) == 0) 225 return EADDRNOTAVAIL; 226 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 227 struct ifaddr *ia = NULL; 228 229 sin6->sin6_port = 0; /* yech... */ 230 #if defined(NFAITH) && NFAITH > 0 231 if ((in6p->in6p_flags & IN6P_FAITH) == 0 232 && (ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 233 #else 234 if ((ia = ifa_ifwithaddr((struct sockaddr *)sin6)) == 0) 235 #endif 236 return(EADDRNOTAVAIL); 237 238 /* 239 * XXX: bind to an anycast address might accidentally 240 * cause sending a packet with anycast source address. 241 */ 242 if (ia && 243 ((struct in6_ifaddr *)ia)->ia6_flags & 244 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY| 245 IN6_IFF_DETACHED|IN6_IFF_DEPRECATED)) { 246 return(EADDRNOTAVAIL); 247 } 248 } 249 if (lport) { 250 #ifndef IPNOPRIVPORTS 251 /* GROSS */ 252 if (ntohs(lport) < IPV6PORT_RESERVED && 253 (p == 0 || 254 (error = suser(p->p_ucred, &p->p_acflag)))) 255 return(EACCES); 256 #endif 257 258 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 259 /* should check this but we can't ... */ 260 #if 0 261 struct inpcb *t; 262 263 t = in_pcblookup_bind(&tcbtable, 264 (struct in_addr *)&sin6->sin6_addr.s6_addr32[3], 265 lport); 266 if (t && (reuseport & t->inp_socket->so_options) == 0) 267 return EADDRINUSE; 268 #endif 269 } else { 270 struct in6pcb *t; 271 272 t = in6_pcblookup(head, &zeroin6_addr, 0, 273 &sin6->sin6_addr, lport, wild); 274 if (t && (reuseport & t->in6p_socket->so_options) == 0) 275 return(EADDRINUSE); 276 } 277 } 278 in6p->in6p_laddr = sin6->sin6_addr; 279 } 280 281 if (lport == 0) { 282 int e; 283 if ((e = in6_pcbsetport(&in6p->in6p_laddr, in6p)) != 0) 284 return(e); 285 } 286 else 287 in6p->in6p_lport = lport; 288 289 in6p->in6p_flowinfo = sin6 ? sin6->sin6_flowinfo : 0; /*XXX*/ 290 return(0); 291 } 292 293 /* 294 * Connect from a socket to a specified address. 295 * Both address and port must be specified in argument sin6. 296 * If don't have a local address for this socket yet, 297 * then pick one. 298 */ 299 int 300 in6_pcbconnect(in6p, nam) 301 struct in6pcb *in6p; 302 struct mbuf *nam; 303 { 304 struct in6_addr *in6a = NULL; 305 struct sockaddr_in6 *sin6 = mtod(nam, struct sockaddr_in6 *); 306 struct in6_pktinfo *pi; 307 struct ifnet *ifp = NULL; /* outgoing interface */ 308 int error = 0; 309 struct in6_addr mapped; 310 311 (void)&in6a; /* XXX fool gcc */ 312 313 if (nam->m_len != sizeof(*sin6)) 314 return(EINVAL); 315 if (sin6->sin6_family != AF_INET6) 316 return(EAFNOSUPPORT); 317 if (sin6->sin6_port == 0) 318 return(EADDRNOTAVAIL); 319 320 /* sanity check for mapped address case */ 321 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 322 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 323 in6p->in6p_laddr.s6_addr16[5] = htons(0xffff); 324 if (!IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 325 return EINVAL; 326 } else { 327 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 328 return EINVAL; 329 } 330 331 /* 332 * If the scope of the destination is link-local, embed the interface 333 * index in the address. 334 */ 335 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) { 336 /* XXX boundary check is assumed to be already done. */ 337 /* XXX sin6_scope_id is weaker than advanced-api. */ 338 if (in6p->in6p_outputopts && 339 (pi = in6p->in6p_outputopts->ip6po_pktinfo) && 340 pi->ipi6_ifindex) { 341 sin6->sin6_addr.s6_addr16[1] = htons(pi->ipi6_ifindex); 342 ifp = ifindex2ifnet[pi->ipi6_ifindex]; 343 } 344 else if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 345 in6p->in6p_moptions && 346 in6p->in6p_moptions->im6o_multicast_ifp) { 347 sin6->sin6_addr.s6_addr16[1] = 348 htons(in6p->in6p_moptions->im6o_multicast_ifp->if_index); 349 ifp = ifindex2ifnet[in6p->in6p_moptions->im6o_multicast_ifp->if_index]; 350 } else if (sin6->sin6_scope_id) { 351 /* boundary check */ 352 if (sin6->sin6_scope_id < 0 353 || if_index < sin6->sin6_scope_id) { 354 return ENXIO; /* XXX EINVAL? */ 355 } 356 sin6->sin6_addr.s6_addr16[1] 357 = htons(sin6->sin6_scope_id & 0xffff);/*XXX*/ 358 ifp = ifindex2ifnet[sin6->sin6_scope_id]; 359 } 360 } 361 362 /* Source address selection. */ 363 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 364 && in6p->in6p_laddr.s6_addr32[3] == 0) { 365 struct sockaddr_in sin, *sinp; 366 367 bzero(&sin, sizeof(sin)); 368 sin.sin_len = sizeof(sin); 369 sin.sin_family = AF_INET; 370 bcopy(&sin6->sin6_addr.s6_addr32[3], &sin.sin_addr, 371 sizeof(sin.sin_addr)); 372 sinp = in_selectsrc(&sin, (struct route *)&in6p->in6p_route, 373 in6p->in6p_socket->so_options, NULL, &error); 374 if (sinp == 0) { 375 if (error == 0) 376 error = EADDRNOTAVAIL; 377 return(error); 378 } 379 bzero(&mapped, sizeof(mapped)); 380 mapped.s6_addr16[5] = htons(0xffff); 381 bcopy(&sinp->sin_addr, &mapped.s6_addr32[3], sizeof(sinp->sin_addr)); 382 in6a = &mapped; 383 } else { 384 /* 385 * XXX: in6_selectsrc might replace the bound local address 386 * with the address specified by setsockopt(IPV6_PKTINFO). 387 * Is it the intended behavior? 388 */ 389 in6a = in6_selectsrc(sin6, in6p->in6p_outputopts, 390 in6p->in6p_moptions, 391 &in6p->in6p_route, 392 &in6p->in6p_laddr, &error); 393 if (in6a == 0) { 394 if (error == 0) 395 error = EADDRNOTAVAIL; 396 return(error); 397 } 398 } 399 if (in6p->in6p_route.ro_rt) 400 ifp = in6p->in6p_route.ro_rt->rt_ifp; 401 402 in6p->in6p_ip6.ip6_hlim = (u_int8_t)in6_selecthlim(in6p, ifp); 403 404 if (in6_pcblookup(in6p->in6p_head, 405 &sin6->sin6_addr, 406 sin6->sin6_port, 407 IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) ? 408 in6a : &in6p->in6p_laddr, 409 in6p->in6p_lport, 410 0)) 411 return(EADDRINUSE); 412 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr) 413 || (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 414 && in6p->in6p_laddr.s6_addr32[3] == 0)) { 415 if (in6p->in6p_lport == 0) 416 (void)in6_pcbbind(in6p, (struct mbuf *)0); 417 in6p->in6p_laddr = *in6a; 418 } 419 in6p->in6p_faddr = sin6->sin6_addr; 420 in6p->in6p_fport = sin6->sin6_port; 421 /* 422 * xxx kazu flowlabel is necessary for connect? 423 * but if this line is missing, the garbage value remains. 424 */ 425 in6p->in6p_flowinfo = sin6->sin6_flowinfo; 426 return(0); 427 } 428 429 void 430 in6_pcbdisconnect(in6p) 431 struct in6pcb *in6p; 432 { 433 bzero((caddr_t)&in6p->in6p_faddr, sizeof(in6p->in6p_faddr)); 434 in6p->in6p_fport = 0; 435 if (in6p->in6p_socket->so_state & SS_NOFDREF) 436 in6_pcbdetach(in6p); 437 } 438 439 void 440 in6_pcbdetach(in6p) 441 struct in6pcb *in6p; 442 { 443 struct socket *so = in6p->in6p_socket; 444 445 #ifdef IPSEC 446 ipsec6_delete_pcbpolicy(in6p); 447 #endif /* IPSEC */ 448 sotoin6pcb(so) = 0; 449 sofree(so); 450 if (in6p->in6p_options) 451 m_freem(in6p->in6p_options); 452 if (in6p->in6p_outputopts) { 453 if (in6p->in6p_outputopts->ip6po_rthdr && 454 in6p->in6p_outputopts->ip6po_route.ro_rt) 455 RTFREE(in6p->in6p_outputopts->ip6po_route.ro_rt); 456 if (in6p->in6p_outputopts->ip6po_m) 457 (void)m_free(in6p->in6p_outputopts->ip6po_m); 458 free(in6p->in6p_outputopts, M_IP6OPT); 459 } 460 if (in6p->in6p_route.ro_rt) 461 rtfree(in6p->in6p_route.ro_rt); 462 ip6_freemoptions(in6p->in6p_moptions); 463 in6p->in6p_next->in6p_prev = in6p->in6p_prev; 464 in6p->in6p_prev->in6p_next = in6p->in6p_next; 465 in6p->in6p_prev = NULL; 466 FREE(in6p, M_PCB); 467 } 468 469 void 470 in6_setsockaddr(in6p, nam) 471 struct in6pcb *in6p; 472 struct mbuf *nam; 473 { 474 struct sockaddr_in6 *sin6; 475 476 nam->m_len = sizeof(*sin6); 477 sin6 = mtod(nam, struct sockaddr_in6 *); 478 bzero((caddr_t)sin6, sizeof(*sin6)); 479 sin6->sin6_family = AF_INET6; 480 sin6->sin6_len = sizeof(struct sockaddr_in6); 481 sin6->sin6_port = in6p->in6p_lport; 482 sin6->sin6_addr = in6p->in6p_laddr; 483 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 484 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 485 else 486 sin6->sin6_scope_id = 0; /*XXX*/ 487 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 488 sin6->sin6_addr.s6_addr16[1] = 0; 489 } 490 491 void 492 in6_setpeeraddr(in6p, nam) 493 struct in6pcb *in6p; 494 struct mbuf *nam; 495 { 496 struct sockaddr_in6 *sin6; 497 498 nam->m_len = sizeof(*sin6); 499 sin6 = mtod(nam, struct sockaddr_in6 *); 500 bzero((caddr_t)sin6, sizeof(*sin6)); 501 sin6->sin6_family = AF_INET6; 502 sin6->sin6_len = sizeof(struct sockaddr_in6); 503 sin6->sin6_port = in6p->in6p_fport; 504 sin6->sin6_addr = in6p->in6p_faddr; 505 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 506 sin6->sin6_scope_id = ntohs(sin6->sin6_addr.s6_addr16[1]); 507 else 508 sin6->sin6_scope_id = 0; /*XXX*/ 509 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) 510 sin6->sin6_addr.s6_addr16[1] = 0; 511 } 512 513 /* 514 * Pass some notification to all connections of a protocol 515 * associated with address dst. The local address and/or port numbers 516 * may be specified to limit the search. The "usual action" will be 517 * taken, depending on the ctlinput cmd. The caller must filter any 518 * cmds that are uninteresting (e.g., no error in the map). 519 * Call the protocol specific routine (if any) to report 520 * any errors for each matching socket. 521 * 522 * Must be called at splsoftnet. 523 */ 524 int 525 in6_pcbnotify(head, dst, fport_arg, laddr6, lport_arg, cmd, notify) 526 struct in6pcb *head; 527 struct sockaddr *dst; 528 u_int fport_arg, lport_arg; 529 struct in6_addr *laddr6; 530 int cmd; 531 void (*notify) __P((struct in6pcb *, int)); 532 { 533 struct in6pcb *in6p, *nin6p; 534 struct in6_addr faddr6; 535 u_int16_t fport = fport_arg, lport = lport_arg; 536 int errno; 537 int nmatch = 0; 538 int do_rtchange = (notify == in6_rtchange); 539 540 if ((unsigned)cmd > PRC_NCMDS || dst->sa_family != AF_INET6) 541 return 0; 542 faddr6 = ((struct sockaddr_in6 *)dst)->sin6_addr; 543 if (IN6_IS_ADDR_UNSPECIFIED(&faddr6)) 544 return 0; 545 546 /* 547 * Redirects go to all references to the destination, 548 * and use in6_rtchange to invalidate the route cache. 549 * Dead host indications: also use in6_rtchange to invalidate 550 * the cache, and deliver the error to all the sockets. 551 * Otherwise, if we have knowledge of the local port and address, 552 * deliver only to that socket. 553 */ 554 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 555 fport = 0; 556 lport = 0; 557 bzero((caddr_t)laddr6, sizeof(*laddr6)); 558 559 do_rtchange = 1; 560 } 561 562 if (notify == NULL) 563 return 0; 564 565 errno = inet6ctlerrmap[cmd]; 566 for (in6p = head->in6p_next; in6p != head; in6p = nin6p) { 567 nin6p = in6p->in6p_next; 568 569 if (do_rtchange) { 570 /* 571 * Since a non-connected PCB might have a cached route, 572 * we always call in6_rtchange without matching 573 * the PCB to the src/dst pair. 574 * 575 * XXX: we assume in6_rtchange does not free the PCB. 576 */ 577 if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_route.ro_dst.sin6_addr, 578 &faddr6)) 579 in6_rtchange(in6p, errno); 580 581 if (notify == in6_rtchange) 582 continue; /* there's nothing to do any more */ 583 } 584 585 /* at this point, we can assume that NOTIFY is not NULL. */ 586 587 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &faddr6) || 588 in6p->in6p_socket == 0 || 589 (lport && in6p->in6p_lport != lport) || 590 (!IN6_IS_ADDR_UNSPECIFIED(laddr6) && 591 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) || 592 (fport && in6p->in6p_fport != fport)) 593 continue; 594 595 (*notify)(in6p, errno); 596 nmatch++; 597 } 598 return nmatch; 599 } 600 601 void 602 in6_pcbpurgeif(head, ifp) 603 struct in6pcb *head; 604 struct ifnet *ifp; 605 { 606 struct in6pcb *in6p, *nin6p; 607 608 for (in6p = head->in6p_next; in6p != head; in6p = nin6p) { 609 nin6p = in6p->in6p_next; 610 if (in6p->in6p_route.ro_rt != NULL && 611 in6p->in6p_route.ro_rt->rt_ifp == ifp) 612 in6_rtchange(in6p, 0); 613 } 614 } 615 616 /* 617 * Check for alternatives when higher level complains 618 * about service problems. For now, invalidate cached 619 * routing information. If the route was created dynamically 620 * (by a redirect), time to try a default gateway again. 621 */ 622 void 623 in6_losing(in6p) 624 struct in6pcb *in6p; 625 { 626 struct rtentry *rt; 627 struct rt_addrinfo info; 628 629 if ((rt = in6p->in6p_route.ro_rt) != NULL) { 630 in6p->in6p_route.ro_rt = 0; 631 bzero((caddr_t)&info, sizeof(info)); 632 info.rti_info[RTAX_DST] = 633 (struct sockaddr *)&in6p->in6p_route.ro_dst; 634 info.rti_info[RTAX_GATEWAY] = rt->rt_gateway; 635 info.rti_info[RTAX_NETMASK] = rt_mask(rt); 636 rt_missmsg(RTM_LOSING, &info, rt->rt_flags, 0); 637 if (rt->rt_flags & RTF_DYNAMIC) 638 (void)rtrequest(RTM_DELETE, rt_key(rt), 639 rt->rt_gateway, rt_mask(rt), rt->rt_flags, 640 (struct rtentry **)0); 641 else 642 /* 643 * A new route can be allocated 644 * the next time output is attempted. 645 */ 646 rtfree(rt); 647 } 648 } 649 650 /* 651 * After a routing change, flush old routing 652 * and allocate a (hopefully) better one. 653 */ 654 void 655 in6_rtchange(in6p, errno) 656 struct in6pcb *in6p; 657 int errno; 658 { 659 if (in6p->in6p_route.ro_rt) { 660 rtfree(in6p->in6p_route.ro_rt); 661 in6p->in6p_route.ro_rt = 0; 662 /* 663 * A new route can be allocated the next time 664 * output is attempted. 665 */ 666 } 667 } 668 669 struct in6pcb * 670 in6_pcblookup(head, faddr6, fport_arg, laddr6, lport_arg, flags) 671 struct in6pcb *head; 672 struct in6_addr *faddr6, *laddr6; 673 u_int fport_arg, lport_arg; 674 int flags; 675 { 676 struct in6pcb *in6p, *match = 0; 677 int matchwild = 3, wildcard; 678 u_int16_t fport = fport_arg, lport = lport_arg; 679 680 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 681 if (in6p->in6p_lport != lport) 682 continue; 683 wildcard = 0; 684 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 685 if (IN6_IS_ADDR_UNSPECIFIED(laddr6)) 686 wildcard++; 687 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 688 continue; 689 } 690 #ifndef TCP6 691 else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) 692 && in6p->in6p_laddr.s6_addr32[3] == 0) { 693 if (!IN6_IS_ADDR_V4MAPPED(laddr6)) 694 continue; 695 if (laddr6->s6_addr32[3] == 0) 696 ; 697 else 698 wildcard++; 699 } 700 #endif 701 else { 702 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 703 #if !defined(TCP6) && !defined(INET6_BINDV6ONLY) 704 if (in6p->in6p_flags & IN6P_BINDV6ONLY) 705 continue; 706 else 707 wildcard++; 708 #else 709 continue; 710 #endif 711 } else if (!IN6_IS_ADDR_UNSPECIFIED(laddr6)) 712 wildcard++; 713 } 714 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 715 if (IN6_IS_ADDR_UNSPECIFIED(faddr6)) 716 wildcard++; 717 else if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6) 718 || in6p->in6p_fport != fport) 719 continue; 720 } 721 #ifndef TCP6 722 else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr) 723 && in6p->in6p_faddr.s6_addr32[3] == 0) { 724 if (!IN6_IS_ADDR_V4MAPPED(faddr6)) 725 continue; 726 if (faddr6->s6_addr32[3] == 0) 727 ; 728 else 729 wildcard++; 730 } 731 #endif 732 else { 733 if (IN6_IS_ADDR_V4MAPPED(faddr6)) { 734 #if !defined(TCP6) && !defined(INET6_BINDV6ONLY) 735 if (in6p->in6p_flags & IN6P_BINDV6ONLY) 736 continue; 737 else 738 wildcard++; 739 #else 740 continue; 741 #endif 742 } else if (!IN6_IS_ADDR_UNSPECIFIED(faddr6)) 743 wildcard++; 744 } 745 746 if (wildcard && (flags & IN6PLOOKUP_WILDCARD) == 0) 747 continue; 748 if (wildcard < matchwild) { 749 match = in6p; 750 matchwild = wildcard; 751 if (matchwild == 0) 752 break; 753 } 754 } 755 return(match); 756 } 757 758 #ifndef TCP6 759 struct rtentry * 760 in6_pcbrtentry(in6p) 761 struct in6pcb *in6p; 762 { 763 struct route_in6 *ro; 764 765 ro = &in6p->in6p_route; 766 767 if (ro->ro_rt == NULL) { 768 /* 769 * No route yet, so try to acquire one. 770 */ 771 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 772 bzero(&ro->ro_dst, sizeof(ro->ro_dst)); 773 ro->ro_dst.sin6_family = AF_INET6; 774 ro->ro_dst.sin6_len = sizeof(struct sockaddr_in6); 775 satosin6(&ro->ro_dst)->sin6_addr = in6p->in6p_faddr; 776 rtalloc((struct route *)ro); 777 } 778 } 779 return (ro->ro_rt); 780 } 781 782 struct in6pcb * 783 in6_pcblookup_connect(head, faddr6, fport_arg, laddr6, lport_arg, faith) 784 struct in6pcb *head; 785 struct in6_addr *faddr6, *laddr6; 786 u_int fport_arg, lport_arg; 787 int faith; 788 { 789 struct in6pcb *in6p; 790 u_int16_t fport = fport_arg, lport = lport_arg; 791 792 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 793 #if defined(NFAITH) && NFAITH > 0 794 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 795 continue; 796 #endif 797 /* find exact match on both source and dest */ 798 if (in6p->in6p_fport != fport) 799 continue; 800 if (in6p->in6p_lport != lport) 801 continue; 802 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) 803 continue; 804 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, faddr6)) 805 continue; 806 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) 807 continue; 808 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 809 continue; 810 return in6p; 811 } 812 return NULL; 813 } 814 815 struct in6pcb * 816 in6_pcblookup_bind(head, laddr6, lport_arg, faith) 817 struct in6pcb *head; 818 struct in6_addr *laddr6; 819 u_int lport_arg; 820 int faith; 821 { 822 struct in6pcb *in6p, *match; 823 u_int16_t lport = lport_arg; 824 825 match = NULL; 826 for (in6p = head->in6p_next; in6p != head; in6p = in6p->in6p_next) { 827 /* 828 * find destination match. exact match is preferred 829 * against wildcard match. 830 */ 831 #if defined(NFAITH) && NFAITH > 0 832 if (faith && (in6p->in6p_flags & IN6P_FAITH) == 0) 833 continue; 834 #endif 835 if (in6p->in6p_fport != 0) 836 continue; 837 if (in6p->in6p_lport != lport) 838 continue; 839 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 840 if (IN6_IS_ADDR_V4MAPPED(laddr6)) { 841 #ifndef INET6_BINDV6ONLY 842 if (in6p->in6p_flags & IN6P_BINDV6ONLY) 843 continue; 844 else 845 match = in6p; 846 #else 847 continue; 848 #endif 849 } else 850 match = in6p; 851 } 852 else if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr) && 853 in6p->in6p_laddr.s6_addr32[3] == 0) { 854 if (IN6_IS_ADDR_V4MAPPED(laddr6) && 855 laddr6->s6_addr32[3] != 0) 856 match = in6p; 857 } 858 else if (IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, laddr6)) 859 return in6p; 860 } 861 return match; 862 } 863 #endif 864
Indexes created Wed Sep 24 05:09:52 GMT 2025